Pneumatic-cushion structure.



H. RUUD.

PNEUMATiC CUSHIQN STRUBUJRE.

APPLICAUON FILED JAH. 3%

i irl-Vil wrm llelenlen hier. lello.,

Application e January 31, 1913. Serial No. @5.351.

To all whom it may concern Be 1t known that L HERBERT F. Roon, u citizen of the United States, residing' et Y Chicago, in the county of Cook und Stute of illinois, have invented certain new und useful improvement in Pneunmtie-Cushion Structures, ol" which the following' is u full, clear, concise, und exact description. reference being had to the necompuuyingg druvv ings, forming u part ci' this s'lecificution.

My invention relates to pneumatic cushions which may be or" particular service in supporting vehicle bodies upon running gears although the .invention is vnot t@ o restricted to this adaptation.

The various objects und a( vuntuges oit my invention ".vill be fully expluined by refe-rence to the accompanying d 'owing showingl the preferred embodiment thereof, but to which embodiment the invention is not to be limited, and in which drawing-- Figure l is o rear elevation of the lower portion of an 'automobile equipped with the device ot' my invent-ion; Fig. 9. is :i side 'view of the automobile; Fig. 3 is u vertical sec tionul view of one cushion structure not under compression; Fig. 4. shows the structure of Fig. 3 under stress; und l3`ig`, 5 is u horizontal sectional View taken ut the niiijl portion of a. cushion structure.

Like parts are indicated h v similar churacters of reference throughout the diii'erent figures.

I have shown :m automobile vehicle body l which is mounted upon vehicle axle structures 2 through the `interniediution of the pneumatic cushion ,structures oi my invention, and the vehicle muy be. equipped zwith wheels `3 hui/'infr solid cushion tires Ll. Tour abutment pins o ure carried by and project upwardly from the mile strucures 2 near the axle ends and fourehutment pins 6, which are normally in suhstantiulb7 vertical slinement with the pins 5, ure carried hy and depend from the vehicle body. The pins of each pair 0f vertically' :dined pins 5, 6 ere received Withinthe cavities or seats afforded by the cupped portions of rigid allotments 7, the. alinefl ubntments 'i of each. pair being symmetrically arranged correspondence to the symmetrical arrangement of the 'corresponding pins 5,

Each abutment is in the orln of :i disk with its central portion depressed to form o cylindrical cup, the cups oit' euch pair of abutments 7 projectihg within hollou7 resilient pneumatic cushion elements 8 mode preferably of rubber composition as u. suit* uhly yielding material und iiiurtuling fencl'ulllv of the forni of u globe, vvhenlnot under stre. There :ire Ythus tivo cushion elements Si which are sinin'letricully arranged und ure noru'uxlly in suhstuntiul vertical niinement, und the polniportior. of euch cushion is penctruted liv the cup por-- tion oil the coi'rcsmiuiling nhutnient Euch such cup portion is ecriorly threaded" to receive n clamping nut S), the polfir end of u cushion being received between the nut 9 und the plate oi' flange or" the corresponding abutment li'. The ends of each oui-rof cushions opposite their polarends :ire held fixedly spurt preferably by u structure com-` prsing :in inner cylinder .l0 outwardly tiered :it its ends and :in outer cylinder ll. coaxial with cylinder l0 und made in three alined ports the tu'o lower ones of which are in threaded engagement, the middle part being turned to secure the clamping liction. The inner endsloit 'the cushions of u pair are received within the spuce that is uliordvcd lbetween the cylinder the outer cylinder be ing,y initialljY shortened for the purpose of thus reccivii'ig the inner ends of the cushions hctiveen the cylinders. uhcreni'ter the ruiddle section of this outer cylinder is turned to lengthen such cylinder whereupon the inner ends oi" the cushions 1re iixedly held h v the pressure which the outer cylinder exerts upon the inner cylinder through the interposed cushion Pinie. This dumping pressure upon the cushion rims is exerted both' longitudinally and transversely of the cylinders or `spacers und l1 by having;

l the diameters of the the ends of cylinder l() onlyT slightly thun the (humeter of the bore of the c y'linder ll.. The inner ends of the cushions are desireloly thickened or heeded :is illustrated so es to conform to the space jointly shaped by the ends of the cylinders l() und l1 and whereby the desired clamping fiction is better uttained. 'Those of e pair of cushioustruc tures upon euch side oit the vehicle con nected by u pipe 'l2 'which may loe ileziihle, this pipe passing; through theciflinders i0 and il neer their upper L chipie 13 is connected with e. mido' portion oi: the pipe 12, this nipple heilig' selected for cow nection with un nir pump which thus muy 

